# Apache Airflow 1.4.0 — Release & Upgrade Intelligence
- **Product:** Apache Airflow (https://airflow.apache.org)
- **Version:** 1.4.0
- **Released:** Aug 18, 2015
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/airflow/updates/1.4.0/

## Executive Summary (TL;DR)
Apache Airflow 1.4.0. Source highlight: Python3 compatibility improvements

## Improvements
- Python3 compatibility improvements

## Bug Fixes
- Bugfixes and polish!